Drill bit



Jan. 11 1927.

DRILL BIT Filed April .3, 1924 H. H. CASSRIEL Eggs/5 El? Patented Jan. 11, 1927. l

UNITED STAT HENRY H. cAssRIEL, oF COAL'INGA, CALIFORNIA.

DRILL BIT. I,

Application :filed .April 3,

This invention relates to a bit for standard drill rigs intended .to enable a. specimen of the rock being drilled lin to be taken to the surface. v

Another object of the invention is to pro` vide means whereby it will be unnecessary to use thev sampling mechanism it no sample Y t j j K n and 1t is provided with shank .9 which 1s.

is desired, the bit then being' used merely as the ordinary bit is used.

Another object of the invention is to provide means for ejectinglthe'sample from the drill when it has been packed tightly therein.

Other objects ot' the invention will appear as the description proceeds.

An embodiment of the invention is shown in the accompanying drawings in which the same reference numeral is applied to the same portion throughout, but I am aware that there may be modilications thereof.

Fig. 1 is a vertical sectional view of the drill bit,

Fig. 2 is a view of the spring used to eject the sample from the drill bit,

Fig. 3 is a vertical .section of the drill bit showing the spring and center in place when no sample is to be taken,

Fig. 4 is a vertical section ot the drill with the center up to take a sample of the bottom,

Fig. on a larger scale,

Fig. 6 is a crossesection of the drill,

Fig. 7 is a larger scale view of thercenter retaining pin, v

Fig. 8 is a view in elevation of the drill center plug,

Figs. 9 to 13 are side elevationsof dilerent forms of drill bits used in the placeof the center plug when no sample is to be taken, and

Figs. 14 to 18 are plan views of the bottom of the bits shown in Figs. 9 to 13.

Fig. 19V is a side elevation of the tool used 'tor driving the pin 6 out, and for reaming the holes when reaming becomes necessary.

The drill bit 1 has the usual water-ways 1', 1, and is a hollow cylinder for a portion of its length, and is solid for the remainder. of its length, there being a threaded coupling lug 2 at the upper end. The drill is .sharpened in the usual manner at the lower end, and has two pairs of aligned round holes therein at 3 and 4 and apair of elongated holes at 5.

rEhe holes 3 and 4 are tor the purpose 5 is a cross-section of the drill bit 1924.y semi No. 703,965;

of receiving the taper pin 6 to retain the drill center either in the position shownf in Fig.l 3 orin'the position shown'in Fig. 4, the latter being theL position' inA which the. center is placed'when a sample is to beremovcd from 'l thewell. i Y

The drill center. p lug` 7 has a hole lat S small enough to pass inside the spiralspring 10, and ot such a length that it willV touch the drill at the top of the'hole therein when the spring 10'is fully'compressed'. It is rtheol)- ject to the .spring is compressed to prevent injury to the spring as well as to prevent undue shearing on the pin vwhich is then'inserted in the hole to hold the center in place.

If a sample of the bottom of the well is to be taken, the drill is arranged as shown in Fig. 4 with the pinholding the center plug up.

The drill is then operated in the usual manner, andas the bottom is cut the hole in the drill is gradually tightlyv packed full ot the bottom .drillings After a suitable time has passed to fill the hole the drill may be pulled up and the pin 6 removed, whereupon the spring will torce the drillings forming the packed core out of the drill to be eXn amined.

When the samples are to be taken, often the plug 7 issecured in place with the pin 6 as shown in condition until the sample is to be taken, when the plug is raised as shown in Fig. 4. The small bits may .also be used without removing the plug, it` desired, by simply securing them in the drill when the plug is raised as shown in Fig. 4.

It no samples are to be taken, the .drill bits shown in Figs. 9 to 18 may be used. These bits of different lshapes ontheir cutting ends, may be triangular, as shown at 15, square, as shown at 16, chisel-shaped, as shown at 17, pointed, asshown at 18 or roseshaped, as shown at 19, but in each instance there is a shoulder 2O to bear on the bottom of the drill, and a shank 21 with a hole to correspond withthe holes of the drill at 4.

Since these bits are intended for continuous, heavy use, it may happen that the pounding the drill is given may partiallyjv shear the pin 6, ory in some way liX the small bits so tightly inthe hole that they cannot bel easily removed, in which event a heavy have the shank 9 touch the drill when Fig. 3, the .drill is used in that ico wedge may be placed in the elongated holes at 5 to forcethe bits out of the drill.

In Fig. 19 there is illustrated a tool which is a combined punch and reamer, which is used for the purpose of driving the pin 6 out of the drill. The handle .25 .is in the shape of a hammer with a longpointed end, while, what appears to be the handle of vthe hammer at 26 is a reamer for smoothing up the holes of the drill bits or the holes of the drill l should they become hammered due -to long usage.

lVhatI claim is as follows, but modificationsV niay be made in carrying out the invention shownA in the drawings and in the above particularly described form thereof, within the purview of the invent-ion as de-` lfined by the annexed Vclaims'.

l. A drill bit or" the character described,

comprising a hollow drill, a closure forthe opening in said drill, a spiral vspring in said opening and means to secure said closure Hush with the end of the drill or in a position to compress said spring.

2. In a drill of the character described, a

a position to compress said spring the closure having a Shank extending into l the spiral spring. Y l

8. A ldrill of the character described, co1nprising a drill having an opening extending` longitudinally thereinto and having transverse openings therethrough, a closure for the longitudinal opening, a spring in said Opening and a pin to secure said closure flush with the end of the drill or with the spring compressed whereby an opening for the collection of samples is produced.

In testimony whereof I have hereunto set my hand this lst day of March, A. D. 1924.

HENRY H. CASSRIEL. 

